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How to solve this? I know how to do the Pythagorean theorem but this only gives 1 side

How to solve this I know how to do the Pythagorean theorem but this only gives 1 side class=

Respuesta :

a2+b2=c2
c2=10
x2+x2=100
2x=100
x=50
Divide by 2 to get 25.
Get square root of 25 
Your answer is 5